The sound comes from material associated with YouTuber Pamtri, filed under the title Sandy Needs More Nuts, a reference to Sandy Cheeks the squirrel from SpongeBob SquarePants. Its spaced title, B A R K O N A T R E E, reflects how the line is delivered, stretched out letter by letter rather than spoken normally. That unusual delivery helped it circulate as a small meme clip on soundboards, where short cartoon parody lines are reused out of context for jokes about trees, squirrels, nuts and painfully literal spelling.